Jan 3, 2025 · A Use Case Diagram is a type of Unified Modeling Language (UML) diagram that represents the interaction between actors (users or external systems) and a system under consideration to accomplish specific goals.

In the Unified Modeling Language (UML), a use case diagram can summarize the details of your system's users (also known as actors) and their interactions with the system. To build one, you'll use a set of specialized symbols and connectors.

Use case diagrams are usually referred to as behavior diagrams used to describe a set of actions (use cases) that some system or systems (subject) should or can perform in collaboration with one or more external users of the system (actors).

Sep 12, 2023 · To understand a use case, you need to identify the actors and the use cases involved in the system. An actor is an external entity that has a role in the interaction with the system. An actor can be a person, another system, or a time event.

A UML use case diagram is the primary form of system/software requirements for a new software program underdeveloped. Use cases specify the expected behavior (what), and not the exact method of making it happen (how).

Dec 2, 2022 · A UML (Unified Modeling Language) use case diagram is a visual representation of the interactions between actors (users or external systems) and a system under consideration. It depicts the functionality or behavior of a system from the user’s perspective.

Mar 28, 2025 · UML (Unified Modeling Language) use case diagrams are essential tools in software engineering for capturing and visualizing the functional requirements of a system. They help stakeholders understand the interactions between users (actors) and the system, ensuring that the system meets the desired business goals.

Use cases allow to capture requirements of systems under design or consideration, describe functionality provided by those systems, and determine the requirements the systems pose on their environment. UML Specifications, e.g. [UML 2.5 RTF - Beta 2] provide several slightly different definitions of use case.

What is a Use Case Diagram in UML? A use case is a list of actions or event steps typically defining the interactions between a role of an actor and a system to achieve a goal. A use case is a useful technique for identifying, clarifying, and organizing system requirements.

Mar 7, 2025 · What is a UML use case diagram? The Use Case Diagram is a view that describes the system functions and is composed of actors, use cases, and the relationships between them. It is observable by external users called actors. A model diagram of system functions. Use case diagrams are often used in the requirements analysis phase. Ⅱ.